“…Brazilian political science has made a minimal contribution to horizontal policy diffusion across subnational governments. The few studies have a focus on: intergovernmental relations, innovation of public administration and local initiatives (Farah, 2008a(Farah, , 2008b; adoption of governmental professional careers (Palotti et al, 2016); interstate cooperation (Abrucio et al, 2016); conditional cash transfers (Sugiyama, 2008;Coêlho, 2012aCoêlho, , 2012b; participation and social control (Wampler, 2008;Porto de Oliveira, 2016); health and education (Sugiyama, 2007;Coêlho et al, 2016;Segatto, 2018); vertical and horizontal diffusion of constitution norms (Couto & Absher-Bellon, 2018); and the spread of metropolitan regions in Brazil (Fernandes et al, 2019). In the U.S., state constitutions 2 give autonomy to the states to define the portfolio of public policies, and this is a central theme in the literature of policy diffusion, which has investigated a large group of policies in different areas.…”